Cashco POSR-2 Bedienungsanleitung

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MODEL POSR-2
PILOT OPERATED PRESSURE RE DUC ING REGULATOR
SECTION I
I. DESCRIPTION AND SCOPE
The POSR-2 is a pilot operated pressure reducing reg u la tor used to control downstream (P
2
) pressure. Sizes are
1", 1-1/2", 2", 3" and 4" (DN25, 40, 50, 80, 100). The unit is suitable for steam service only. Refer to Technical Bul-
letin POSR-2-TB for design conditions and selection recommendations. NOT RECOMMENDED FOR DEAD END
SERVICE.
SECTION II
II. INSTALLATION
A. General:
IOM-POSR-2
12-13
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
6. Clean the piping of all foreign material in-
clud ing chips, welding scale, oil, grease and
dirt before installing the regulator. Strainers
are recommended.
B. Piping the Valve:
1. An inlet block valve should always be in-
stalled.
2. If service application is continuous such that
shut down is not readily accomplished, it is
recommended that an inlet block valve, outlet
block valve, and a manual bypass valve be
installed.
3. Pipe unions are recommended for NPT
screwed in stal la tions to allow removal from
piping.
4. An outlet pressure gauge should be located ap-
prox i mate ly ten pipe diameters down stream,
and within sight.
5. All installations should include a downstream
re lief device if the inlet pressure could ex-
ceed the pressure rating of any downstream
equip ment or the maximum allowable outlet
pres sure rating of the unit.
FIGURE 1
Recommended Piping Schematic for POSR-2
WARNING
Do not dead end (no ow demand) downstream of POSR-2
if P
1
- Inlet Pressure is greater than max i mum allowable
outlet design pressure.
Max. Allowable
Spring Range Outlet Pressure
5-15 psig (0.34–1.03 Barg) 100 psig (6.9 Barg)
10–40 psig (0.69–2.8 Barg) 200 psig (13.8 Barg)
30–80 psig (2.1–5.5 Barg) 200 psig (13.8 Barg)
70–150 psig (4.8–10.3 Barg) 200 psig (13.8 Barg)
CAUTION
Installation of adequate overpressure pro tec tion is recom-
mended to pro tect the reg u la tor from overpressure and
all down stream equip ment from damage in the event of
regulator failure.
CAUTION
For welded installations, all internal trim parts, seals and
diaphragm(s) must be removed from reg u la tor body prior to
welding into pipeline. The heat of fusion welding will dam-
age non-metallic parts if not re moved. NOTE: This does
not apply to units equipped with extended pipe nip ples.
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Inhaltsverzeichnis

Seite 1 - MODEL POSR-2

MODEL POSR-2PILOT OPERATED PRESSURE RE DUC ING REGULATORSECTION II. DESCRIPTION AND SCOPE The POSR-2 is a pilot operated pressure reducing reg u la

Seite 2 - III. PRINCIPLE OF OPERATION

IOM-POSR-21021. Using a sharp, fl at-edged tool, clean the gas- ket fac ings and all surfaces where a metal-to-metal joint occurs on the body (1), bonn

Seite 3 - POSITION “VD”

IOM-POSR-2 11partial assembly of previous article above until centered over the peg. Lower partial assembly down onto peg until weight is resting on p

Seite 4 - IV. START-UP

IOM-POSR-21257. Rig the reassembled main valve (MV) for over head hoisting. Re move temporary duct tape. Lift and remove from vise.E. Joining:1. Plac

Seite 5

IOM-POSR-2 135. Remove hose from open end of jar. Open valve #2. Close valve #1. Place hose end back into jar. Follow a similar pro ce dure as in art

Seite 6

IOM-POSR-2147. Slowly pressurize the inlet of the main valve (MV) and pilot valve (PV) to 100 psig (6.9 Barg). NOTE: If the pilot valve (PV) has any

Seite 7

IOM-POSR-2 15SECTION IXNEW REPLACEMENT UNIT:Contact your local Cashco, Inc., Sales Rep re sen ta- tive with the Serial Number and Product code. With

Seite 8

IOM-POSR-216NOTES

Seite 10

IOM-POSR-218FIGURE 7FIGURE 8 ITEM NO. DESCRIPTION 19 Pipe Nipple 20 Tube Fitting 21 Tubing 26 90° Elbow 27 90° Street Elbow 28 Union 29 Pip

Seite 11 - WARNING

IOM-POSR-2 19FIGURE 10POSR-2 Flanged End Con nec tionFIGURE 9MV – MAIN VALVE ITEM NO. DESCRIPTION 1 Body 2 Bonnet 3 Cylinder 4 Cylinder Head 5

Seite 12 - VII. LEAK TESTING

IOM-POSR-2210. See Figure 2 for installation ori en ta tion for hor i zon tal or vertical piping. For best per for -mance Cashco rec om mends in sta

Seite 13

ITEM NO. DESCRIPTION 1 Body 2 Spring Chamber 4 Plug & Seat Assembly 4.1 Valve Seat 4.2 Valve Plug 6 Screen 7 Spring 8 Valve

Seite 14 - VIII. TROUBLE SHOOTING GUIDE

IOM-POSR-2 3FIGURE 2Orientation/ArrangementPOSITION “H”POSITION “VU”Pilot valve and main valve shipped as two units. Installer to connect between pilo

Seite 15 - CAUTION

IOM-POSR-24the bleed orifi ce. The reduced loading pres- sure on the upper side of the piston closes the main valve’s plug enough to restore the down

Seite 16 - IOM-POSR-216

IOM-POSR-2 5SECTION VV. SHUTDOWNA. General1. On systems with a bypass valve, and where system pressure is to be maintained as the POSR-2 is shut down

Seite 17 - IOM-POSR-2 17

IOM-POSR-262. Loosen locknut (20) by rotating CCW (viewed from above) ONLY two revolutions. Relax range spring (15) by turning adjusting screw (19) C

Seite 18 - FIGURE 6

IOM-POSR-2 718. Remove seat gasket (8) using a tool with a bent sharp end. Discard the seat gasket (8).19. Using a sharp edged tool, clean all gaske

Seite 19

IOM-POSR-28the bolts (17) before replacing into bolt hole. Fin ger-tighten nuts (18).41. Observe through opening in top of spring cham ber (2) to ens

Seite 20

IOM-POSR-2 9not apply excessive sideways force to the cylinder (3). Move the fl at tool fully around the bonnet-to-body joint to ensure being fully loo

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